/Engine/Source/Runtime/CoreUObject/Public/UObject/Object.h
Implement CookAdditionalFilesOverride to define sub class behavior.
void CookAdditionalFiles ( const TCHAR * PackageFilename, const [ITargetPlatform](API\Developer\TargetPlatform\Interfaces\ITargetPlatform) * TargetPlatform, [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< void(const TCHAR *Filename, void *[Data](API\Plugins\PCG\EPCGComponentDirtyFlag), int64Size)> WriteAdditionalFile )